Crystalline solids are

Classify solids on the basis of their electrical conductivities.

Which of the following has the lowest fusion temperature?

$STATEMENT-1$: Band gap in germanium is small.
$STATEMENT-2$: The energy spread of each germanium atomic energy level is infinitesimally small.

Which of the following is an example of a metallic crystalline solid?

$A$ solid which is very hard,has a very high melting point in the solid state,is an insulator,and becomes a conductor of electricity in its molten state is a/an ..... solid.